Anyone Find Liandry's To Just Be Really Weird?

I mean you look at the item and it just goes every where:

Liandry's Torment +300 Health +80 Ability Power

Oh so you want me to build it on tankier AP champions right?

UNIQUE Passive- Eyes of Pain: +15 Magic Penetration

OH WAIT, it's an AP Assassin item to kill squishies!?

UNIQUE Passive: Dealing spell damage applies a damage-over-time effect that deals bonus magic damage equal to 2% of the target's current health per second for 3 seconds. This bonus damage is doubled against movement-impaired units and capped at 100 damage per second vs. monsters.

Oh wait, it's for DPS/DoT Mages that want Tank busting stats?

This bonus damage is doubled against movement-impaired units

CONTROL MAGES!?

Like, was this item just designed to be built alongside Rylai's? If not, I have no idea who to build this on other than a Tanky, DPS/DoT Mage with built in crowd control against tank teams. It just doesn't seem to have a clear direction to me. It's not like Infinity Edge to where it's like "I'll build this on AD Burst Marksman" or Deathcap to where it's like "I'll build this on anyone who relies on having tons of AP" or Guinsoo's Rageblade to where it's like "This is for on-hit champions/builds."